The Killzone.com site recently received an update allowing you to upload and download battle replays and also updates to the main page with things such as Featured and Upcoming Tournaments and also Featured Matches, and plenty more.
Seb also says among other things that the site is undergoing PSN wide maintenance and will not be up until later in the day. He also says that the release notes for the site's recent update will be posted up once the site is back up and running.
motherh666 says: "its back. Bigger and better than ever. its clicking into place now and will take a while to reach everywhere. There is however some PSN wide maintenance for the next few hours, so it will not show any game date. Will all be back up and running later today. We'll post a list of updates in a news post on the site when its ready.
2 days till "Steel & Titanium", patches and server updates with new features in the works, site update done. Who says we're not doing anything for you crazy kids."